Efeitos do número de dias pós-parto sobre o desempenho bioeconômico de vacas de corte submetidas à inseminação artificiall em tempo fixo (IATF) / Bioeconomic performance of beef cows submitted to a fi xed time insemination program in different periods after calving

RESUMO

Sessenta vacas foram divididas em dois grupos (Grupo I, n=35; Grupo II, n=25), conforme os dias pós-parto por ocasião da inseminação artificial em tempo fixo (IATF), realizada em 07/12/2007. Os animais do Grupo I, por ocasião da IATF, apresentaram um número de dias pós-parto (DPP) médio de 89,4 dias, enquanto os animais do Grupo II apresentaram um DPP médio de 65,1 dias (p0,05)...

ABSTRACT

Sixty cows were divided in two groups (Group I, n=35; Group II, n=25), this division was realized in 07/12/2007 according to the postpartum days for occasion of artifi cial insemination (FTAI) in all animals. The average number of postpartum days was 89.4 in the Group I and in the Group II the average number was 65.1 days (p0,05). However, the pregnancy cost at FTAI was for Group I and Group II, respectively, R$ 83,30 and R$ 148,75. PR-Final resulted in a final cost/ pregnancy of R$ 75,22 and R$ 81,87, respectively for Groups I and II. The cows submitted to the FTAI in different periods postpartum presented different cost/ pregnancy. The variable cost/pregnancy is directly related to the pregnancy rate to the FTAI as well as after the use of clean-up bulls